Walthill 1E Weather Records (USC00258935)
Record envelope, standing records and threshold days for Walthill 1E (USC00258935), Nebraska, United States, with 109 years of record.
Key Facts for Walthill 1E
- Walthill 1E (USC00258935) is a weather station in Nebraska, United States at 42.15 latitude and -96.48 longitude, 390 m (1,280 ft) above sea level.
- The station reports from 1909 to 2017, 109 years of record.
- 1,464 records set at Walthill 1E still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Walthill 1E set a daily record precipitation of 30.0 mm (1.2 in) on 27 August 2017.
About the Station
- Location: Nebraska, United States, 42.15 latitude, -96.48 longitude.
- Elevation: 390 m (1,280 ft).
- Period of record: 1909 to 2017, 109 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.6 C (69.1 F) | -42.8 C (-45.0 F) | n/a | n/a |
| Feb | 22.2 C (72.0 F) | -36.7 C (-34.1 F) | n/a | n/a |
| Mar | 36.7 C (98.1 F) | -31.7 C (-25.1 F) | n/a | n/a |
| Apr | 36.1 C (97.0 F) | -17.8 C (0.0 F) | n/a | n/a |
| May | 40.0 C (104.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Jun | 41.7 C (107.1 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jul | 45.0 C (113.0 F) | 2.8 C (37.0 F) | n/a | n/a |
| Aug | 42.2 C (108.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Sep | 40.0 C (104.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Oct | 34.4 C (93.9 F) | -17.8 C (0.0 F) | n/a | n/a |
| Nov | 28.9 C (84.0 F) | -27.8 C (-18.0 F) | n/a | n/a |
| Dec | 24.4 C (75.9 F) | -34.4 C (-29.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1909 | 10 |
| 1910 | 15 |
| 1911 | 15 |
| 1912 | 27 |
| 1913 | 19 |
| 1914 | 8 |
| 1915 | 17 |
| 1916 | 14 |
| 1917 | 25 |
| 1918 | 15 |
| 1919 | 13 |
| 1920 | 14 |
| 1921 | 14 |
| 1922 | 12 |
| 1923 | 18 |
| 1924 | 22 |
| 1925 | 15 |
| 1926 | 12 |
| 1927 | 17 |
| 1928 | 20 |
| 1929 | 14 |
| 1930 | 29 |
| 1931 | 14 |
| 1932 | 9 |
| 1933 | 20 |
| 1934 | 45 |
| 1935 | 20 |
| 1936 | 73 |
| 1937 | 18 |
| 1938 | 15 |
| 1939 | 22 |
| 1940 | 12 |
| 1941 | 13 |
| 1942 | 16 |
| 1943 | 6 |
| 1944 | 14 |
| 1945 | 16 |
| 1946 | 7 |
| 1947 | 11 |
| 1948 | 13 |
| 1949 | 7 |
| 1950 | 13 |
| 1951 | 12 |
| 1952 | 11 |
| 1953 | 14 |
| 1954 | 12 |
| 1955 | 30 |
| 1956 | 13 |
| 1957 | 9 |
| 1958 | 10 |
| 1959 | 13 |
| 1960 | 16 |
| 1961 | 11 |
| 1962 | 16 |
| 1963 | 10 |
| 1964 | 11 |
| 1965 | 10 |
| 1966 | 12 |
| 1967 | 11 |
| 1968 | 9 |
| 1969 | 9 |
| 1970 | 8 |
| 1971 | 7 |
| 1972 | 10 |
| 1973 | 7 |
| 1974 | 12 |
| 1978 | 4 |
| 1979 | 9 |
| 1980 | 13 |
| 1981 | 19 |
| 1982 | 9 |
| 1983 | 15 |
| 1984 | 6 |
| 1985 | 8 |
| 1986 | 6 |
| 1987 | 11 |
| 1988 | 11 |
| 1989 | 25 |
| 1990 | 12 |
| 1991 | 20 |
| 1992 | 19 |
| 1993 | 10 |
| 1994 | 7 |
| 1995 | 12 |
| 1996 | 7 |
| 1997 | 12 |
| 1998 | 16 |
| 1999 | 15 |
| 2000 | 27 |
| 2001 | 4 |
| 2002 | 5 |
| 2003 | 13 |
| 2004 | 11 |
| 2005 | 11 |
| 2006 | 11 |
| 2007 | 4 |
| 2008 | 4 |
| 2009 | 11 |
| 2010 | 3 |
| 2011 | 6 |
| 2012 | 25 |
| 2013 | 11 |
| 2014 | 15 |
| 2015 | 7 |
| 2016 | 7 |
| 2017 | 11 |
Wettest Day of Each Month
Jun: 141.0 mm (5.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 50.8 mm (2.0 in) | 31 January 1915 |
| Feb | 51.1 mm (2.0 in) | 13 February 1919 |
| Mar | 68.6 mm (2.7 in) | 23 March 1987 |
| Apr | 88.9 mm (3.5 in) | 10 April 1913 |
| May | 88.9 mm (3.5 in) | 5 May 1932 |
| Jun | 141.0 mm (5.6 in) | 4 June 1940 |
| Jul | 139.2 mm (5.5 in) | 17 July 1996 |
| Aug | 100.3 mm (3.9 in) | 28 August 1960 |
| Sep | 94.5 mm (3.7 in) | 26 September 1915 |
| Oct | 89.9 mm (3.5 in) | 30 October 1979 |
| Nov | 59.4 mm (2.3 in) | 24 November 2001 |
| Dec | 50.3 mm (2.0 in) | 2 December 1933 |
Period of Record Coverage
1909 to 2017| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1909 | 165 | 45% | No |
| 1910 | 98 | 27% | No |
| 1911 | 271 | 74% | No |
| 1912 | 195 | 53% | No |
| 1913 | 363 | 99% | Yes |
| 1914 | 356 | 98% | Yes |
| 1915 | 363 | 99% | Yes |
| 1916 | 359 | 98% | Yes |
| 1917 | 364 | 100% | Yes |
| 1918 | 293 | 80% | No |
| 1919 | 363 | 99% | Yes |
| 1920 | 360 | 98% | Yes |
| 1921 | 361 | 99% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 356 | 98% | Yes |
| 1924 | 357 | 98% | Yes |
| 1925 | 344 | 94% | Yes |
| 1926 | 354 | 97% | Yes |
| 1927 | 363 | 99% | Yes |
| 1928 | 334 | 91% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 363 | 99% | Yes |
| 1931 | 363 | 99% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 361 | 99% | Yes |
| 1934 | 362 | 99% | Yes |
| 1935 | 359 | 98% | Yes |
| 1936 | 358 | 98% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 362 | 99% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 363 | 99% | Yes |
| 1942 | 273 | 75% | No |
| 1943 | 268 | 73% | No |
| 1944 | 348 | 95% | Yes |
| 1945 | 333 | 91% | Yes |
| 1946 | 286 | 78% | No |
| 1947 | 295 | 81% | No |
| 1948 | 360 | 98% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 344 | 94% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 362 | 99% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 349 | 96% | Yes |
| 1958 | 358 | 98% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 323 | 88% | No |
| 1961 | 290 | 79% | No |
| 1962 | 358 | 98% | Yes |
| 1963 | 359 | 98% | Yes |
| 1964 | 362 | 99% | Yes |
| 1965 | 356 | 98% | Yes |
| 1966 | 350 | 96% | Yes |
| 1967 | 321 | 88% | No |
| 1968 | 252 | 69% | No |
| 1969 | 292 | 80% | No |
| 1970 | 351 | 96% | Yes |
| 1971 | 361 | 99% | Yes |
| 1972 | 329 | 90% | No |
| 1973 | 357 | 98% | Yes |
| 1974 | 261 | 72% | No |
| 1975 | 51 | 14% | No |
| 1978 | 239 | 65% | No |
| 1979 | 363 | 99% | Yes |
| 1980 | 322 | 88% | No |
| 1981 | 256 | 70% | No |
| 1982 | 333 | 91% | Yes |
| 1983 | 347 | 95% | Yes |
| 1984 | 326 | 89% | No |
| 1985 | 330 | 90% | Yes |
| 1986 | 307 | 84% | No |
| 1987 | 298 | 82% | No |
| 1988 | 336 | 92% | Yes |
| 1989 | 348 | 95% | Yes |
| 1990 | 324 | 89% | No |
| 1991 | 325 | 89% | No |
| 1992 | 312 | 85% | No |
| 1993 | 322 | 88% | No |
| 1994 | 335 | 92% | Yes |
| 1995 | 348 | 95% | Yes |
| 1996 | 342 | 93% | Yes |
| 1997 | 349 | 96% | Yes |
| 1998 | 346 | 95% | Yes |
| 1999 | 323 | 88% | No |
| 2000 | 355 | 97% | Yes |
| 2001 | 148 | 41% | No |
| 2002 | 182 | 50% | No |
| 2003 | 349 | 96% | Yes |
| 2004 | 350 | 96% | Yes |
| 2005 | 347 | 95% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 354 | 97% | Yes |
| 2011 | 362 | 99% | Yes |
| 2012 | 365 | 100% | Yes |
| 2013 | 351 | 96% | Yes |
| 2014 | 350 | 96% | Yes |
| 2015 | 354 | 97% | Yes |
| 2016 | 344 | 94% | Yes |
| 2017 | 242 | 66% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 August 2017 | Walthill 1E, US | daily rain | 30.0 mm (1.2 in) | 9.4 mm (0.37 in) | 94 years | 45 of 100 (Notable) |
| 16 August 2017 | Walthill 1E, US | daily rain | 83.6 mm (3.3 in) | 47.5 mm (1.9 in) | 72 years | 67 of 100 (Major) |
| 6 August 2017 | Walthill 1E, US | daily low max | 18.3 C (64.9 F) | 3.4 C (6.1 F) | 68 years | 38 of 100 (Notable) |
| 4 August 2017 | Walthill 1E, US | daily low max | 21.7 C (71.1 F) | 0.5 C (0.9 F) | 102 years | 41 of 100 (Notable) |
| 12 June 2017 | Walthill 1E, US | daily high min | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 0 years | 11 of 100 (Routine) |
| 20 May 2017 | Walthill 1E, US | daily low max (Tie) | 9.4 C (48.9 F) | tie | 102 years | 10 of 100 (Routine) |
| 1 May 2017 | Walthill 1E, US | daily snowfall | 5.1 cm (2.0 in) | 3.8 cm (1.5 in) | 106 years | 47 of 100 (Notable) |
| 1 May 2017 | Walthill 1E, US | daily snow depth | 5.1 cm (2.0 in) | 2.6 cm (1.0 in) | 106 years | 20 of 100 (Routine) |
| 1 May 2017 | Walthill 1E, US | daily low max | 4.4 C (39.9 F) | 1.7 C (3.1 F) | 63 years | 30 of 100 (Routine) |
| 27 April 2017 | Walthill 1E, US | daily low max | 5.0 C (41.0 F) | 1.7 C (3.1 F) | 80 years | 36 of 100 (Notable) |
| 9 April 2017 | Walthill 1E, US | daily high min (Tie) | 8.9 C (48.0 F) | tie | 95 years | 9 of 100 (Routine) |
| 7 March 2017 | Walthill 1E, US | daily high max (Tie) | 24.4 C (75.9 F) | tie | 16 years | 3 of 100 (Routine) |
| 6 March 2017 | Walthill 1E, US | daily high min | 11.7 C (53.1 F) | 1.7 C (3.1 F) | 24 years | 19 of 100 (Routine) |
| 24 February 2017 | Walthill 1E, US | daily snowfall | 17.8 cm (7.0 in) | 7.6 cm (3.0 in) | 83 years | 47 of 100 (Notable) |
| 24 February 2017 | Walthill 1E, US | daily rain | 13.5 mm (0.5 in) | 3.3 mm (0.13 in) | 16 years | 18 of 100 (Routine) |
| 23 February 2017 | Walthill 1E, US | daily high max | 18.9 C (66.0 F) | 2.8 C (5.0 F) | 87 years | 39 of 100 (Notable) |
| 22 February 2017 | Walthill 1E, US | daily high max | 21.7 C (71.1 F) | 0.6 C (1.1 F) | 35 years | 20 of 100 (Routine) |
| 20 February 2017 | Walthill 1E, US | daily high max | 19.4 C (66.9 F) | 1.1 C (2.0 F) | 36 years | 21 of 100 (Routine) |
| 20 February 2017 | Walthill 1E, US | daily high min | 4.4 C (39.9 F) | 3.3 C (5.9 F) | 22 years | 20 of 100 (Routine) |
| 26 January 2017 | Walthill 1E, US | daily rain | 10.9 mm (0.4 in) | 1.5 mm (0.06 in) | 85 years | 20 of 100 (Routine) |
Climate Trend
76 complete years, 1913 to 2016| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1913 | 9.4 C | +0.01 C |
| 1914 | 9.4 C | +0.01 C |
| 1915 | 8.6 C | -0.76 C |
| 1916 | 8.4 C | -0.98 C |
| 1917 | 7.1 C | -2.26 C |
| 1919 | 8.7 C | -0.70 C |
| 1920 | 8.9 C | -0.49 C |
| 1921 | 11.0 C | +1.60 C |
| 1922 | 9.9 C | +0.52 C |
| 1923 | 8.8 C | -0.61 C |
| 1924 | 7.4 C | -1.99 C |
| 1925 | 9.1 C | -0.26 C |
| 1926 | 9.3 C | -0.08 C |
| 1927 | 8.8 C | -0.63 C |
| 1929 | 7.7 C | -1.74 C |
| 1930 | 9.5 C | +0.09 C |
| 1931 | 11.3 C | +1.92 C |
| 1932 | 8.4 C | -0.96 C |
| 1933 | 10.5 C | +1.05 C |
| 1934 | 11.1 C | +1.69 C |
| 1935 | 9.5 C | +0.14 C |
| 1936 | 9.1 C | -0.31 C |
| 1937 | 8.5 C | -0.95 C |
| 1938 | 10.5 C | +1.08 C |
| 1939 | 10.6 C | +1.15 C |
| 1940 | 8.4 C | -0.96 C |
| 1941 | 9.9 C | +0.51 C |
| 1944 | 9.2 C | -0.16 C |
| 1948 | 9.2 C | -0.18 C |
| 1949 | 9.1 C | -0.34 C |
| 1950 | 7.5 C | -1.95 C |
| 1951 | 7.8 C | -1.58 C |
| 1952 | 9.9 C | +0.51 C |
| 1953 | 10.6 C | +1.24 C |
| 1954 | 10.6 C | +1.17 C |
| 1955 | 9.8 C | +0.40 C |
| 1956 | 10.0 C | +0.56 C |
| 1958 | 9.1 C | -0.31 C |
| 1959 | 9.2 C | -0.23 C |
| 1962 | 9.0 C | -0.43 C |
| 1963 | 10.0 C | +0.55 C |
| 1964 | 9.7 C | +0.32 C |
| 1965 | 9.0 C | -0.37 C |
| 1966 | 8.8 C | -0.62 C |
| 1970 | 9.2 C | -0.25 C |
| 1971 | 9.3 C | -0.15 C |
| 1973 | 10.4 C | +0.96 C |
| 1979 | 8.2 C | -1.17 C |
| 1982 | 9.0 C | -0.43 C |
| 1983 | 9.2 C | -0.20 C |
| 1984 | 9.4 C | +0.03 C |
| 1985 | 8.7 C | -0.74 C |
| 1986 | 10.4 C | +1.02 C |
| 1988 | 10.5 C | +1.10 C |
| 1989 | 9.2 C | -0.25 C |
| 1991 | 10.3 C | +0.93 C |
| 1994 | 9.5 C | +0.08 C |
| 1995 | 9.8 C | +0.41 C |
| 1996 | 8.2 C | -1.21 C |
| 1997 | 9.4 C | 0.00 C |
| 1998 | 11.2 C | +1.77 C |
| 1999 | 11.0 C | +1.60 C |
| 2000 | 10.5 C | +1.14 C |
| 2003 | 9.3 C | -0.09 C |
| 2005 | 10.6 C | +1.22 C |
| 2006 | 10.6 C | +1.20 C |
| 2007 | 9.7 C | +0.32 C |
| 2008 | 8.0 C | -1.39 C |
| 2009 | 8.3 C | -1.12 C |
| 2010 | 9.2 C | -0.20 C |
| 2011 | 9.1 C | -0.33 C |
| 2012 | 11.5 C | +2.07 C |
| 2013 | 8.2 C | -1.19 C |
| 2014 | 8.1 C | -1.35 C |
| 2015 | 9.9 C | +0.51 C |
| 2016 | 10.7 C | +1.26 C |
The fitted trend in annual mean temperature here over 1913 to 2016 is 0.06 C (-0.01 to 0.13) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.10 F (-0.02 to 0.23) per decade. The slope is a straight line fitted to 76 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.06 C (-0.01 to 0.13) per decade | 0.10 F (-0.02 to 0.23) per decade | 1913 to 2016 | 76 | Not clearly different from zero |
| Mean daily maximum | 0.12 C (0.03 to 0.20) per decade | 0.2 F (0.1 to 0.4) per decade | 1913 to 2016 | 76 | Rise |
| Mean daily minimum | -0.01 C (-0.08 to 0.07) per decade | -0.01 F (-0.14 to 0.12) per decade | 1913 to 2016 | 76 | Not clearly different from zero |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1909 to 2017| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.0 C (113.0 F) | 1936 | 37.8 C (100.0 F) | 107 |
| Coldest night (TNn) | -42.8 C (-45.0 F) | 1912 | -28.3 C (-18.9 F) | 107 |
| Wettest day (Rx1day) | 141.0 mm (5.6 in) | 1940 | 56.8 mm (2.2 in) | 106 |
| Wettest five days (Rx5day) | 179.3 mm (7.1 in) | 1940 | 87.1 mm (3.4 in) | 106 |
| Longest dry spell (CDD) | 81 days | 1967 | 30 days | 106 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1909 | 38.3 C (100.9 F) |
| 1910 | 36.7 C (98.1 F) |
| 1911 | 40.6 C (105.1 F) |
| 1912 | 40.0 C (104.0 F) |
| 1913 | 37.8 C (100.0 F) |
| 1914 | 37.8 C (100.0 F) |
| 1915 | 36.1 C (97.0 F) |
| 1916 | 37.8 C (100.0 F) |
| 1917 | 38.3 C (100.9 F) |
| 1918 | 38.9 C (102.0 F) |
| 1919 | 36.1 C (97.0 F) |
| 1920 | 35.0 C (95.0 F) |
| 1921 | 36.1 C (97.0 F) |
| 1922 | 37.8 C (100.0 F) |
| 1923 | 35.0 C (95.0 F) |
| 1924 | 32.8 C (91.0 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 39.4 C (102.9 F) |
| 1927 | 35.6 C (96.1 F) |
| 1928 | 35.6 C (96.1 F) |
| 1929 | 36.1 C (97.0 F) |
| 1930 | 39.4 C (102.9 F) |
| 1931 | 38.3 C (100.9 F) |
| 1932 | 36.7 C (98.1 F) |
| 1933 | 40.0 C (104.0 F) |
| 1934 | 42.2 C (108.0 F) |
| 1935 | 39.4 C (102.9 F) |
| 1936 | 45.0 C (113.0 F) |
| 1937 | 39.4 C (102.9 F) |
| 1938 | 39.4 C (102.9 F) |
| 1939 | 40.6 C (105.1 F) |
| 1940 | 40.6 C (105.1 F) |
| 1941 | 36.1 C (97.0 F) |
| 1942 | 37.8 C (100.0 F) |
| 1943 | 37.8 C (100.0 F) |
| 1944 | 37.8 C (100.0 F) |
| 1945 | 35.6 C (96.1 F) |
| 1946 | 41.1 C (106.0 F) |
| 1947 | 40.6 C (105.1 F) |
| 1948 | 37.2 C (99.0 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 36.1 C (97.0 F) |
| 1952 | 38.3 C (100.9 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 40.6 C (105.1 F) |
| 1955 | 41.7 C (107.1 F) |
| 1956 | 37.8 C (100.0 F) |
| 1957 | 38.9 C (102.0 F) |
| 1958 | 36.1 C (97.0 F) |
| 1959 | 36.7 C (98.1 F) |
| 1960 | 37.8 C (100.0 F) |
| 1961 | 38.9 C (102.0 F) |
| 1962 | 36.1 C (97.0 F) |
| 1963 | 36.1 C (97.0 F) |
| 1964 | 38.9 C (102.0 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 38.3 C (100.9 F) |
| 1967 | 40.0 C (104.0 F) |
| 1968 | 37.8 C (100.0 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 37.2 C (99.0 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 37.2 C (99.0 F) |
| 1973 | 37.2 C (99.0 F) |
| 1974 | 40.6 C (105.1 F) |
| 1975 | 7.2 C (45.0 F) |
| 1978 | 37.8 C (100.0 F) |
| 1979 | 38.3 C (100.9 F) |
| 1980 | 38.9 C (102.0 F) |
| 1981 | 37.8 C (100.0 F) |
| 1982 | 37.2 C (99.0 F) |
| 1983 | 38.9 C (102.0 F) |
| 1984 | 38.3 C (100.9 F) |
| 1985 | 40.0 C (104.0 F) |
| 1986 | 36.1 C (97.0 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 41.7 C (107.1 F) |
| 1989 | 38.3 C (100.9 F) |
| 1990 | 39.4 C (102.9 F) |
| 1991 | 36.1 C (97.0 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 35.6 C (96.1 F) |
| 1995 | 42.2 C (108.0 F) |
| 1996 | 34.4 C (93.9 F) |
| 1997 | 36.1 C (97.0 F) |
| 1998 | 36.1 C (97.0 F) |
| 1999 | 36.7 C (98.1 F) |
| 2000 | 39.4 C (102.9 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 40.0 C (104.0 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 36.1 C (97.0 F) |
| 2005 | 38.9 C (102.0 F) |
| 2006 | 40.6 C (105.1 F) |
| 2007 | 36.7 C (98.1 F) |
| 2008 | 37.2 C (99.0 F) |
| 2009 | 35.6 C (96.1 F) |
| 2010 | 36.7 C (98.1 F) |
| 2011 | 38.9 C (102.0 F) |
| 2012 | 42.2 C (108.0 F) |
| 2013 | 39.4 C (102.9 F) |
| 2014 | 35.6 C (96.1 F) |
| 2015 | 36.7 C (98.1 F) |
| 2016 | 37.8 C (100.0 F) |
| 2017 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1909 | -15.0 C (5.0 F) |
| 1910 | -8.9 C (16.0 F) |
| 1911 | -25.0 C (-13.0 F) |
| 1912 | -42.8 C (-45.0 F) |
| 1913 | -28.3 C (-18.9 F) |
| 1914 | -27.8 C (-18.0 F) |
| 1915 | -31.1 C (-24.0 F) |
| 1916 | -32.8 C (-27.0 F) |
| 1917 | -34.4 C (-29.9 F) |
| 1918 | -33.3 C (-27.9 F) |
| 1919 | -30.0 C (-22.0 F) |
| 1920 | -28.9 C (-20.0 F) |
| 1921 | -23.9 C (-11.0 F) |
| 1922 | -23.9 C (-11.0 F) |
| 1923 | -26.1 C (-15.0 F) |
| 1924 | -33.9 C (-29.0 F) |
| 1925 | -26.1 C (-15.0 F) |
| 1926 | -26.1 C (-15.0 F) |
| 1927 | -26.1 C (-15.0 F) |
| 1928 | -25.0 C (-13.0 F) |
| 1929 | -30.0 C (-22.0 F) |
| 1930 | -30.0 C (-22.0 F) |
| 1931 | -20.6 C (-5.1 F) |
| 1932 | -28.9 C (-20.0 F) |
| 1933 | -31.1 C (-24.0 F) |
| 1934 | -25.0 C (-13.0 F) |
| 1935 | -26.1 C (-15.0 F) |
| 1936 | -32.8 C (-27.0 F) |
| 1937 | -27.2 C (-17.0 F) |
| 1938 | -26.1 C (-15.0 F) |
| 1939 | -28.9 C (-20.0 F) |
| 1940 | -30.0 C (-22.0 F) |
| 1941 | -20.6 C (-5.1 F) |
| 1942 | -29.4 C (-20.9 F) |
| 1943 | -25.0 C (-13.0 F) |
| 1944 | -35.6 C (-32.1 F) |
| 1945 | -25.6 C (-14.1 F) |
| 1946 | -25.6 C (-14.1 F) |
| 1947 | -27.2 C (-17.0 F) |
| 1948 | -32.8 C (-27.0 F) |
| 1949 | -28.9 C (-20.0 F) |
| 1950 | -31.7 C (-25.1 F) |
| 1951 | -27.8 C (-18.0 F) |
| 1952 | -22.8 C (-9.0 F) |
| 1953 | -31.1 C (-24.0 F) |
| 1954 | -27.8 C (-18.0 F) |
| 1955 | -29.4 C (-20.9 F) |
| 1956 | -27.8 C (-18.0 F) |
| 1957 | -32.2 C (-26.0 F) |
| 1958 | -31.7 C (-25.1 F) |
| 1959 | -31.1 C (-24.0 F) |
| 1960 | -31.7 C (-25.1 F) |
| 1961 | -28.9 C (-20.0 F) |
| 1962 | -36.7 C (-34.1 F) |
| 1963 | -31.7 C (-25.1 F) |
| 1964 | -36.1 C (-33.0 F) |
| 1965 | -30.6 C (-23.1 F) |
| 1966 | -31.1 C (-24.0 F) |
| 1967 | -29.4 C (-20.9 F) |
| 1968 | -30.6 C (-23.1 F) |
| 1969 | -30.6 C (-23.1 F) |
| 1970 | -36.1 C (-33.0 F) |
| 1971 | -27.8 C (-18.0 F) |
| 1972 | -28.9 C (-20.0 F) |
| 1973 | -29.4 C (-20.9 F) |
| 1974 | -32.8 C (-27.0 F) |
| 1975 | -30.0 C (-22.0 F) |
| 1978 | -25.6 C (-14.1 F) |
| 1979 | -32.2 C (-26.0 F) |
| 1980 | -29.4 C (-20.9 F) |
| 1981 | -31.7 C (-25.1 F) |
| 1982 | -30.6 C (-23.1 F) |
| 1983 | -32.2 C (-26.0 F) |
| 1984 | -27.8 C (-18.0 F) |
| 1985 | -28.3 C (-18.9 F) |
| 1986 | -24.4 C (-11.9 F) |
| 1987 | -21.7 C (-7.1 F) |
| 1988 | -33.3 C (-27.9 F) |
| 1989 | -32.8 C (-27.0 F) |
| 1990 | -27.8 C (-18.0 F) |
| 1991 | -27.2 C (-17.0 F) |
| 1992 | -22.8 C (-9.0 F) |
| 1993 | -28.3 C (-18.9 F) |
| 1994 | -28.9 C (-20.0 F) |
| 1995 | -26.1 C (-15.0 F) |
| 1996 | -33.3 C (-27.9 F) |
| 1997 | -26.7 C (-16.1 F) |
| 1998 | -28.3 C (-18.9 F) |
| 1999 | -28.9 C (-20.0 F) |
| 2000 | -26.1 C (-15.0 F) |
| 2001 | -27.2 C (-17.0 F) |
| 2002 | -17.8 C (0.0 F) |
| 2003 | -25.6 C (-14.1 F) |
| 2004 | -25.0 C (-13.0 F) |
| 2005 | -25.0 C (-13.0 F) |
| 2006 | -24.4 C (-11.9 F) |
| 2007 | -27.2 C (-17.0 F) |
| 2008 | -27.2 C (-17.0 F) |
| 2009 | -27.8 C (-18.0 F) |
| 2010 | -30.6 C (-23.1 F) |
| 2011 | -25.6 C (-14.1 F) |
| 2012 | -20.0 C (-4.0 F) |
| 2013 | -23.3 C (-9.9 F) |
| 2014 | -26.7 C (-16.1 F) |
| 2015 | -26.1 C (-15.0 F) |
| 2016 | -29.4 C (-20.9 F) |
| 2017 | -21.1 C (-6.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1909 | 25.4 mm (1.0 in) |
| 1910 | 27.9 mm (1.1 in) |
| 1911 | 32.5 mm (1.3 in) |
| 1912 | 50.8 mm (2.0 in) |
| 1913 | 88.9 mm (3.5 in) |
| 1914 | 50.3 mm (2.0 in) |
| 1915 | 94.5 mm (3.7 in) |
| 1916 | 52.1 mm (2.1 in) |
| 1917 | 86.9 mm (3.4 in) |
| 1918 | 37.3 mm (1.5 in) |
| 1919 | 66.5 mm (2.6 in) |
| 1920 | 106.7 mm (4.2 in) |
| 1921 | 41.4 mm (1.6 in) |
| 1922 | 104.6 mm (4.1 in) |
| 1923 | 87.6 mm (3.4 in) |
| 1924 | 50.3 mm (2.0 in) |
| 1925 | 43.2 mm (1.7 in) |
| 1926 | 52.1 mm (2.1 in) |
| 1927 | 53.3 mm (2.1 in) |
| 1928 | 63.5 mm (2.5 in) |
| 1929 | 48.8 mm (1.9 in) |
| 1930 | 55.9 mm (2.2 in) |
| 1931 | 41.9 mm (1.6 in) |
| 1932 | 88.9 mm (3.5 in) |
| 1933 | 50.3 mm (2.0 in) |
| 1934 | 42.4 mm (1.7 in) |
| 1935 | 34.8 mm (1.4 in) |
| 1936 | 31.2 mm (1.2 in) |
| 1937 | 66.5 mm (2.6 in) |
| 1938 | 95.0 mm (3.7 in) |
| 1939 | 31.8 mm (1.3 in) |
| 1940 | 141.0 mm (5.6 in) |
| 1941 | 45.7 mm (1.8 in) |
| 1942 | 50.5 mm (2.0 in) |
| 1943 | 38.1 mm (1.5 in) |
| 1944 | 63.0 mm (2.5 in) |
| 1945 | 87.9 mm (3.5 in) |
| 1946 | 55.9 mm (2.2 in) |
| 1947 | 44.5 mm (1.8 in) |
| 1948 | 39.4 mm (1.6 in) |
| 1949 | 43.4 mm (1.7 in) |
| 1950 | 63.2 mm (2.5 in) |
| 1951 | 46.7 mm (1.8 in) |
| 1952 | 101.3 mm (4.0 in) |
| 1953 | 57.4 mm (2.3 in) |
| 1954 | 94.0 mm (3.7 in) |
| 1955 | 33.5 mm (1.3 in) |
| 1956 | 66.5 mm (2.6 in) |
| 1957 | 84.6 mm (3.3 in) |
| 1958 | 69.9 mm (2.8 in) |
| 1959 | 60.2 mm (2.4 in) |
| 1960 | 100.3 mm (3.9 in) |
| 1961 | 46.2 mm (1.8 in) |
| 1962 | 72.4 mm (2.9 in) |
| 1963 | 28.2 mm (1.1 in) |
| 1964 | 62.5 mm (2.5 in) |
| 1965 | 54.1 mm (2.1 in) |
| 1966 | 58.4 mm (2.3 in) |
| 1967 | 78.0 mm (3.1 in) |
| 1968 | 62.2 mm (2.4 in) |
| 1969 | 71.6 mm (2.8 in) |
| 1970 | 37.8 mm (1.5 in) |
| 1971 | 40.4 mm (1.6 in) |
| 1972 | 96.5 mm (3.8 in) |
| 1973 | 45.7 mm (1.8 in) |
| 1974 | 53.3 mm (2.1 in) |
| 1975 | n/a |
| 1978 | 66.0 mm (2.6 in) |
| 1979 | 89.9 mm (3.5 in) |
| 1980 | 27.4 mm (1.1 in) |
| 1981 | 35.6 mm (1.4 in) |
| 1982 | 55.4 mm (2.2 in) |
| 1983 | 56.4 mm (2.2 in) |
| 1984 | 76.2 mm (3.0 in) |
| 1985 | 41.7 mm (1.6 in) |
| 1986 | 68.3 mm (2.7 in) |
| 1987 | 68.6 mm (2.7 in) |
| 1988 | 71.1 mm (2.8 in) |
| 1989 | 73.7 mm (2.9 in) |
| 1990 | 60.5 mm (2.4 in) |
| 1991 | 45.7 mm (1.8 in) |
| 1992 | 63.5 mm (2.5 in) |
| 1993 | 80.8 mm (3.2 in) |
| 1994 | 71.9 mm (2.8 in) |
| 1995 | 48.3 mm (1.9 in) |
| 1996 | 139.2 mm (5.5 in) |
| 1997 | 36.3 mm (1.4 in) |
| 1998 | 51.3 mm (2.0 in) |
| 1999 | 85.6 mm (3.4 in) |
| 2000 | 139.7 mm (5.5 in) |
| 2001 | 69.6 mm (2.7 in) |
| 2002 | 38.1 mm (1.5 in) |
| 2003 | 50.8 mm (2.0 in) |
| 2004 | 57.2 mm (2.3 in) |
| 2005 | 60.2 mm (2.4 in) |
| 2006 | 38.6 mm (1.5 in) |
| 2007 | 80.8 mm (3.2 in) |
| 2008 | 35.1 mm (1.4 in) |
| 2009 | 56.4 mm (2.2 in) |
| 2010 | 74.2 mm (2.9 in) |
| 2011 | 48.3 mm (1.9 in) |
| 2012 | 63.0 mm (2.5 in) |
| 2013 | 40.1 mm (1.6 in) |
| 2014 | 85.9 mm (3.4 in) |
| 2015 | 47.0 mm (1.9 in) |
| 2016 | 63.0 mm (2.5 in) |
| 2017 | 83.6 mm (3.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1909 | 47.0 mm (1.9 in) |
| 1910 | 52.0 mm (2.0 in) |
| 1911 | 58.4 mm (2.3 in) |
| 1912 | 50.8 mm (2.0 in) |
| 1913 | 107.7 mm (4.2 in) |
| 1914 | 61.2 mm (2.4 in) |
| 1915 | 126.5 mm (5.0 in) |
| 1916 | 71.4 mm (2.8 in) |
| 1917 | 110.3 mm (4.3 in) |
| 1918 | 59.9 mm (2.4 in) |
| 1919 | 105.7 mm (4.2 in) |
| 1920 | 107.0 mm (4.2 in) |
| 1921 | 65.5 mm (2.6 in) |
| 1922 | 146.8 mm (5.8 in) |
| 1923 | 96.0 mm (3.8 in) |
| 1924 | 97.6 mm (3.8 in) |
| 1925 | 48.5 mm (1.9 in) |
| 1926 | 88.8 mm (3.5 in) |
| 1927 | 81.8 mm (3.2 in) |
| 1928 | 93.3 mm (3.7 in) |
| 1929 | 66.1 mm (2.6 in) |
| 1930 | 110.8 mm (4.4 in) |
| 1931 | 64.6 mm (2.5 in) |
| 1932 | 113.3 mm (4.5 in) |
| 1933 | 57.2 mm (2.3 in) |
| 1934 | 75.6 mm (3.0 in) |
| 1935 | 59.9 mm (2.4 in) |
| 1936 | 59.4 mm (2.3 in) |
| 1937 | 97.0 mm (3.8 in) |
| 1938 | 146.6 mm (5.8 in) |
| 1939 | 41.4 mm (1.6 in) |
| 1940 | 179.3 mm (7.1 in) |
| 1941 | 67.8 mm (2.7 in) |
| 1942 | 73.9 mm (2.9 in) |
| 1943 | 65.5 mm (2.6 in) |
| 1944 | 87.2 mm (3.4 in) |
| 1945 | 98.1 mm (3.9 in) |
| 1946 | 73.5 mm (2.9 in) |
| 1947 | 79.6 mm (3.1 in) |
| 1948 | 59.2 mm (2.3 in) |
| 1949 | 73.4 mm (2.9 in) |
| 1950 | 86.9 mm (3.4 in) |
| 1951 | 76.7 mm (3.0 in) |
| 1952 | 101.3 mm (4.0 in) |
| 1953 | 93.0 mm (3.7 in) |
| 1954 | 129.6 mm (5.1 in) |
| 1955 | 40.9 mm (1.6 in) |
| 1956 | 83.8 mm (3.3 in) |
| 1957 | 177.8 mm (7.0 in) |
| 1958 | 76.8 mm (3.0 in) |
| 1959 | 81.8 mm (3.2 in) |
| 1960 | 114.0 mm (4.5 in) |
| 1961 | 53.6 mm (2.1 in) |
| 1962 | 110.5 mm (4.4 in) |
| 1963 | 56.9 mm (2.2 in) |
| 1964 | 77.8 mm (3.1 in) |
| 1965 | 102.9 mm (4.1 in) |
| 1966 | 78.7 mm (3.1 in) |
| 1967 | 120.6 mm (4.7 in) |
| 1968 | 109.2 mm (4.3 in) |
| 1969 | 84.3 mm (3.3 in) |
| 1970 | 87.6 mm (3.4 in) |
| 1971 | 73.1 mm (2.9 in) |
| 1972 | 136.2 mm (5.4 in) |
| 1973 | 75.5 mm (3.0 in) |
| 1974 | 61.2 mm (2.4 in) |
| 1975 | n/a |
| 1978 | 66.0 mm (2.6 in) |
| 1979 | 117.6 mm (4.6 in) |
| 1980 | 46.2 mm (1.8 in) |
| 1981 | 54.3 mm (2.1 in) |
| 1982 | 88.4 mm (3.5 in) |
| 1983 | 82.4 mm (3.2 in) |
| 1984 | 110.2 mm (4.3 in) |
| 1985 | 100.2 mm (3.9 in) |
| 1986 | 78.7 mm (3.1 in) |
| 1987 | 118.1 mm (4.6 in) |
| 1988 | 168.1 mm (6.6 in) |
| 1989 | 113.6 mm (4.5 in) |
| 1990 | 144.6 mm (5.7 in) |
| 1991 | 92.2 mm (3.6 in) |
| 1992 | 107.1 mm (4.2 in) |
| 1993 | 108.3 mm (4.3 in) |
| 1994 | 101.2 mm (4.0 in) |
| 1995 | 80.5 mm (3.2 in) |
| 1996 | 150.9 mm (5.9 in) |
| 1997 | 61.5 mm (2.4 in) |
| 1998 | 87.6 mm (3.4 in) |
| 1999 | 101.1 mm (4.0 in) |
| 2000 | 161.3 mm (6.4 in) |
| 2001 | 99.0 mm (3.9 in) |
| 2002 | 58.4 mm (2.3 in) |
| 2003 | 109.0 mm (4.3 in) |
| 2004 | 76.7 mm (3.0 in) |
| 2005 | 95.5 mm (3.8 in) |
| 2006 | 53.6 mm (2.1 in) |
| 2007 | 106.0 mm (4.2 in) |
| 2008 | 54.6 mm (2.1 in) |
| 2009 | 70.1 mm (2.8 in) |
| 2010 | 151.7 mm (6.0 in) |
| 2011 | 66.3 mm (2.6 in) |
| 2012 | 90.9 mm (3.6 in) |
| 2013 | 50.6 mm (2.0 in) |
| 2014 | 105.0 mm (4.1 in) |
| 2015 | 120.9 mm (4.8 in) |
| 2016 | 78.2 mm (3.1 in) |
| 2017 | 119.2 mm (4.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1909 | 20 days |
| 1910 | 42 days |
| 1911 | 33 days |
| 1912 | 20 days |
| 1913 | 43 days |
| 1914 | 53 days |
| 1915 | 28 days |
| 1916 | 22 days |
| 1917 | 35 days |
| 1918 | 23 days |
| 1919 | 23 days |
| 1920 | 28 days |
| 1921 | 35 days |
| 1922 | 31 days |
| 1923 | 36 days |
| 1924 | 55 days |
| 1925 | 29 days |
| 1926 | 47 days |
| 1927 | 20 days |
| 1928 | 36 days |
| 1929 | 32 days |
| 1930 | 30 days |
| 1931 | 41 days |
| 1932 | 28 days |
| 1933 | 26 days |
| 1934 | 50 days |
| 1935 | 24 days |
| 1936 | 26 days |
| 1937 | 29 days |
| 1938 | 30 days |
| 1939 | 75 days |
| 1940 | 26 days |
| 1941 | 21 days |
| 1942 | 32 days |
| 1943 | 54 days |
| 1944 | 31 days |
| 1945 | 42 days |
| 1946 | 18 days |
| 1947 | 24 days |
| 1948 | 24 days |
| 1949 | 49 days |
| 1950 | 29 days |
| 1951 | 53 days |
| 1952 | 65 days |
| 1953 | 27 days |
| 1954 | 30 days |
| 1955 | 28 days |
| 1956 | 48 days |
| 1957 | 41 days |
| 1958 | 44 days |
| 1959 | 43 days |
| 1960 | 34 days |
| 1961 | 18 days |
| 1962 | 48 days |
| 1963 | 47 days |
| 1964 | 45 days |
| 1965 | 23 days |
| 1966 | 41 days |
| 1967 | 81 days |
| 1968 | 26 days |
| 1969 | 32 days |
| 1970 | 29 days |
| 1971 | 44 days |
| 1972 | 22 days |
| 1973 | 34 days |
| 1974 | 68 days |
| 1975 | n/a |
| 1978 | 22 days |
| 1979 | 30 days |
| 1980 | 33 days |
| 1981 | 30 days |
| 1982 | 19 days |
| 1983 | 19 days |
| 1984 | 25 days |
| 1985 | 26 days |
| 1986 | 34 days |
| 1987 | 28 days |
| 1988 | 33 days |
| 1989 | 49 days |
| 1990 | 20 days |
| 1991 | 23 days |
| 1992 | 26 days |
| 1993 | 27 days |
| 1994 | 38 days |
| 1995 | 26 days |
| 1996 | 33 days |
| 1997 | 22 days |
| 1998 | 45 days |
| 1999 | 45 days |
| 2000 | 24 days |
| 2001 | 18 days |
| 2002 | 35 days |
| 2003 | 21 days |
| 2004 | 26 days |
| 2005 | 31 days |
| 2006 | 40 days |
| 2007 | 30 days |
| 2008 | 20 days |
| 2009 | 24 days |
| 2010 | 29 days |
| 2011 | 30 days |
| 2012 | 33 days |
| 2013 | 39 days |
| 2014 | 46 days |
| 2015 | 27 days |
| 2016 | 22 days |
| 2017 | 24 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
76 years with a frostAcross 76 years with a frost, the median last spring frost at Walthill 1E falls on 2 May and the median first autumn frost on 30 September, which leaves a median of 152 days between them.
In 1973 to 2016 the median growing season was 153 days. That is 2 days fewer than in 1913 to 1949.
Fitted over all years, the growing season changes by +0.9 days per decade at this station.
| Measure | Median, all years | Earliest period (1913 to 1949) | Recent period (1973 to 2016) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 2 May | 28 April | 29 April | 1 day later | -0.8 days per decade |
| First autumn frost | 30 September | 2 October | 2 October | no change | +0.1 days per decade |
| Growing days | 152 days | 155 days | 153 days | 2 days fewer | +0.9 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
91 years, 1913 to 2016A day with at least 59.1 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 144.7 mm (5.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 59.1 mm (2.3 in) | |
| 5 years | 80.8 mm (3.2 in) | |
| 10 years | 95.6 mm (3.8 in) | |
| 25 years | 114.9 mm (4.5 in) | |
| 50 years | 129.7 mm (5.1 in) | |
| 100 years | 144.7 mm (5.7 in) | Longer than the 91 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 91 years of values from 1913 to 2016.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 141.0 mm (5.6 in) in 1940; 139.7 mm (5.5 in) in 2000; 139.2 mm (5.5 in) in 1996.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Walthill 1E, at 1951. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1951 ran 0.3 C (0.5 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1951 | +0.3 | +0.5 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
1999 to 2016 against 1961 to 1990Over 1999 to 2016, Walthill 1E had a mean temperature of 9.6 C (49.4 F) and 697.3 mm (27.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Mead 6S (United States, 112 km away), Columbus 3 NE (United States, 104 km away) and Genoa 2 W (United States, 132 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Mead 6S | United States | 112 km (70 mi) | 9.8 C (49.7 F) | 688.4 mm (27.1 in) | 0.46 |
| Columbus 3 NE | United States | 104 km (65 mi) | 9.9 C (49.9 F) | 707.3 mm (27.8 in) | 0.52 |
| Genoa 2 W | United States | 132 km (82 mi) | 9.8 C (49.7 F) | 699.3 mm (27.5 in) | 0.57 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).